The equivalent to one-half ounce varies depending upon what is being measured. When measuring the volume of liquids, a standard one-half fluid ounce is equal to one tablespoon, while the metric equivalent is 15 milliliters. However, when measuring mass, one-half ounce is equal to 15 grams.
If dry ingredients are used, one-half ounce is the same as three teaspoons, one tablespoon or 14.3 grams.
To measure a small amount of liquid or dry ingredients, measuring spoons are often used. They are typically available in sets that hold one-quarter teaspoon, one-half teaspoon, one teaspoon and one tablespoon. In addition, the tablespoon is almost identical to 15 milliliters. To measure mass, a kitchen scale is appropriate.